libata-scsi.c (4dbfa39b6c95eb9d0aedb5bd00bb552b91c31e3d) libata-scsi.c (ca77329fb713b7fea6a307068e0dd0248e7aa640)
1/*
2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.

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105 */
106static struct scsi_transport_template ata_scsi_transport_template = {
107 .eh_strategy_handler = ata_scsi_error,
108 .eh_timed_out = ata_scsi_timed_out,
109 .user_scan = ata_scsi_user_scan,
110};
111
112
1/*
2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.

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105 */
106static struct scsi_transport_template ata_scsi_transport_template = {
107 .eh_strategy_handler = ata_scsi_error,
108 .eh_timed_out = ata_scsi_timed_out,
109 .user_scan = ata_scsi_user_scan,
110};
111
112
113static const struct {
114 enum link_pm value;
115 const char *name;
116} link_pm_policy[] = {
117 { NOT_AVAILABLE, "max_performance" },
118 { MIN_POWER, "min_power" },
119 { MAX_PERFORMANCE, "max_performance" },
120 { MEDIUM_POWER, "medium_power" },
121};
122
123const char *ata_scsi_lpm_get(enum link_pm policy)
124{
125 int i;
126
127 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
128 if (link_pm_policy[i].value == policy)
129 return link_pm_policy[i].name;
130
131 return NULL;
132}
133
134static ssize_t ata_scsi_lpm_put(struct class_device *class_dev,
135 const char *buf, size_t count)
136{
137 struct Scsi_Host *shost = class_to_shost(class_dev);
138 struct ata_port *ap = ata_shost_to_port(shost);
139 enum link_pm policy = 0;
140 int i;
141
142 /*
143 * we are skipping array location 0 on purpose - this
144 * is because a value of NOT_AVAILABLE is displayed
145 * to the user as max_performance, but when the user
146 * writes "max_performance", they actually want the
147 * value to match MAX_PERFORMANCE.
148 */
149 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
150 const int len = strlen(link_pm_policy[i].name);
151 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
152 buf[len] == '\n') {
153 policy = link_pm_policy[i].value;
154 break;
155 }
156 }
157 if (!policy)
158 return -EINVAL;
159
160 ata_lpm_schedule(ap, policy);
161 return count;
162}
163
164static ssize_t
165ata_scsi_lpm_show(struct class_device *class_dev, char *buf)
166{
167 struct Scsi_Host *shost = class_to_shost(class_dev);
168 struct ata_port *ap = ata_shost_to_port(shost);
169 const char *policy =
170 ata_scsi_lpm_get(ap->pm_policy);
171
172 if (!policy)
173 return -EINVAL;
174
175 return snprintf(buf, 23, "%s\n", policy);
176}
177CLASS_DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
178 ata_scsi_lpm_show, ata_scsi_lpm_put);
179EXPORT_SYMBOL_GPL(class_device_attr_link_power_management_policy);
180
113static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
114 void (*done)(struct scsi_cmnd *))
115{
116 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
117 /* "Invalid field in cbd" */
118 done(cmd);
119}
120

--- 3419 unchanged lines hidden --- 		181static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
182 void (*done)(struct scsi_cmnd *))
183{
184 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
185 /* "Invalid field in cbd" */
186 done(cmd);
187}
188

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